one who accompanies another person and is with that person (see Molina)
Orthographic Variants:
tenauac yeni
Alonso de Molina:
tenauac yeni. el que acompaña a otro desta manera. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 98v. col. 1. Thanks to Joe Campbell for providing the transcription.